1. Clinical Epidemiology Unit, Department of Orthopaedics, Clinical Sciences Lund, Lund University, Lund, Sweden
2. Department of Orthopaedics, Clinical Sciences Lund, Lund University, Lund, Sweden
3. Musculoskeletal Radiology Section, Skåne University Hospital, Lund University, Lund, Sweden
4. Department of Orthopaedics, Clinical Sciences Malmö, Lund University, Malmö, Sweden